Let's say that the party crowd in general is a distinction, but not them specifically - Amelia is still there, but the crew isn't really "on the job."
The book says:Second, if we get into a physical fight and I want Sleeper to try to knock someone out with sleep gas, would that be Physical Stress, a Complication or does it depend? (And I don’t just mean for this encounter, I mean in general. It’s his name, it’s going to come up sooner or later!)
"Physical stress is bodily injury, exhaustion, the effects of toxins or chemicals, and so forth.
Mental stress is confusion, lack of concentration, mental fatigue, and the results of telepathic assault.
Emotional stress is despair, fear, anger, or any number of negative emotional states."
So I would say, yes, that is normally physical stress. It could be portrayed as a complication if it was less "you're exhausted" and more "you want to go home and take a nap," maybe.